We stayed at The Collector Suite at The Anonymous Common House for 4 nights as a family of 3, and really really enjoyed it. It's a wonderfully decorated, very spacious place, exactly as you see on the photos. It's thoughtfully equipped with everything you need - kitchen utensils, electric kettle, Nescafe coffee machine, iron and ironing board, hair dryer etc etc. Nice showers and comfortable beds. We really enjoyed having breakfast at the cute balcony equipped with the table and chairs and shaded by the big green trees and overlooking the alley.
The flat is located in a beautifully renovated walk-up building just off Silom Rd in a quiet dead-end alley and easy to find. The guys from the hosting team will send you exact Google coordinates and if you take Grab from the airport, they will help you to spot the location of the house in the App (but ask for it in advance, they'll send you a screenshot, though we got a response from the hosting team within 10 minutes!), so we had no issues finding the house. We really liked that it was off the main road and you can be away from the busy traffic. The flat is on the 3rd floor, you need to walk up, but the stairs were really easy and even my 81-year-old Dad did not find them difficult.
Check-in was really easy too. Bogi from the hosting team came to open the flat for us once we arrived. The flat has a dial lock, so you don't need to carry a key around. After check-out you can leave the suitcase downstairs in the lobby of the building where the big lockers are installed - it was such a thoughtful idea from the hosting guys!
Location-wise, we found it pretty convenient. It's just 10 minutes walk to Surasak BTS (Sky Train) station and about 15 minutes walk to Sathon Pier where you can take a Chao Praya Express to all main sightseeing places along the river. Tops Supermarket was just 5 min away on Silom Rd.
The guys from the hosting team will give you plenty of tips what to see and where to eat in the neighborhood. There are several Spa places along Silom Rd within 10 min reach. Personally, we can recommend a seafood restaurant with the open-air garden right at the doorsteps of the Anonymous Common House - we went there twice as food there was really good, especially the steamed fish!
We had a very comfortable stay and highly recommend this place to anyone who travel as a family!